An ecommerce site uses Amazon ElastiCache for Memcached to cache popular product queries. CloudWatch metrics show many cache evictions. Which actions will help reduce eviction counts? (Choose two.)
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Correct answer: Add another node to the ElastiCache cluster to increase total cache capacity., Upgrade the size of each node in the ElastiCache cluster so each node has more memory..
Why this is the answer
Cache evictions occur when the cache runs out of space and must remove existing items to store new ones. To reduce evictions, you need to increase the available memory. Adding another node to the ElastiCache cluster distributes the cached data across more instances, effectively increasing the total cache capacity. Similarly, upgrading the size of each node provides more memory per node, also increasing the overall cache capacity. Increasing the cache TTL would make items stay in the cache longer, potentially increasing evictions if the cache is already full. Placing an Elastic Load Balancer or introducing Amazon SQS are architectural changes that do not directly address the cache capacity issue.
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